Semiautomatic table-moving attachment for presses



.Hume 26, E923. 1,459,757

F. E. sTEvENsON kSEMIAUTOMATIC TABLE MOVlNG ATTACHMENT FOR PRESSES Filed Nov. 19, 1921 3 Sheets-Sheet l june 26, 1923.

F. E. STEVENSON SEMIAUTOMATIC TABLE MOVING ATTACHMENT FOR PRESSES Filed Nov. 19. 1921 3 Sheets-Sheet 2 .Fume 26, 1923.

F. E. STEVENSON SEMIAUTOMATIC TABLE MOVING ATTACHMENT FOR PRESSES Filed Nov. 19 1921 3 Sheets-Sheet 5 ,men-2r ESt/engm y www mm Patented June V26 1923.

NITED STATES PATENT OFFICE.

FRANCIS E. STEVENSON, F MOUNT GILEAI), OHIO, ASSIGNOR TO THE HYDRAULIC PRESS MANUFACTURING COMPANY, OF MOUNT GILEAD, OHIO.

SEMIAUTOMATIC TABLE-MOVING ATTACHMENT FOR PRESSES.

Application tiled November 19, 1921. Serial No. 516,509.

To all whom t may concern Be it known that I, FRANCIS E. STEVEN- soN, a citizen of the United States, residing at Mount Gilead, in the county of Morrow and State of 0hio, have invented certain new and useful Improvements in Semiautomatic Table-Movin Attachments for Presses, of which the foowing is a specification.

This invention relates to a device for use with the work carryin table of a hydraulic or other press, where y said table may be moved to and from an operative position by means which is started by the operator, but is automatically stopped at the termination w of each movement whether this is from operative to inoperative position of said table or vice versa. v

There is employed a rotary member between which and a source of power an oper- 2 ative connection may be manually effected at will, and connections between said rotary member and the work carrying table whereby the rotary movement of the member is converted into a reciprocatory movement of the table.

More specifically these connections. comprise a crank head mounted to rotate both with and on said rotary member and a link capable of longitudinal and rotary movement connecting the crank head and the Work carrying table. f

Detent means, specifically a toggle lock, is provided for holding the parts in operative position after being manually set, and the rotary member carries means for automatically breaking said toggle lock at the termination of a predetermined movement of the rotary member.

In the accompanying drawings,

Figure 1 is a top plan View, with parts in section;

Figure 2 is a vertical section;

Figure 3 is a top plan view of the attachnient on a larger scale;

Figure 4 is a vertical view of the parts shown in Fig. 3, also on a larger scale;

Figures 5, 6, 7, 8 and 9 are plan views, somewhat diagrammatic in character, showing successive steps in the movement of parts of the device as the table isv moved from operative to inoperative position.

rll`he particular t pe of press to which this attachment is app ied forms no part of the invention and there is illustrated only genrallQy an upper member 1 and a platen mem- The work carrying table 3 which is adapted to be reciprocated to a position between said press members, and to another position entirely free thereon, has a slot 4 along one edge in which engages a roller 5 on a pin 6 carried =by the end of an arm 7. This table travels on rollers 8 carried by the platen member, and rollers 9 attached to the housing 10, which contains the operating mechanism for the table 3.

A pin 11 is rigidly mounted in a hub 12 carried by the housing 10, and keyed or otherwise fixed to said pin is a stationary gear 13. Meshing with the gear 13 is a gear 14 keyed or otherwise attached to a crankhead 15 so that they rotate in unison upon a pin 16 rigidly held in a plate 17 which rotates upon the pin 11 beneath the fixed gear 13. The crank-head 15 carries a pin 18 to which is attached the end of the arm 7. This arm has a slot 19 which engages a roller 20 on the upper end of the in 11.

lt is thus seen that t e pin 16, ear 14,

crank-head 15, and pin 18, with attac ed end of the arm 7 all rotate about the pin 11.

Keyed or otherwise rigidly attached to the plate 17 is a worm wheel 21. Located adjacent said worm wheel is a shaft 22 mounted in two bearings 23 and 24. rlhe bea-ring 23 is in the form of a U-joint, having two projecting pins 25, only one of which is shown, engaging in suitable bearings. The bearing 24 is of similar character, having pins 26 held by forked projections on the bar 27, which is slidably mounted in the j housin 10. rlhe shaft 22 carries a worm 28, norma ly disengaged from the worm gea-r 21. Rigidly attached to the bar 27 is a rod 29 provided with a handle 30. A spring 31 is coiled about the rod 29 and held between the front of the housing 10 and nuts 32 on said rod, and normally holds the parts in the dotted line position shown in Figure 2.

A link 33 is pivoted at 34 to the housing 10, and at its other end at 36 to one arm of a bell-crank member 35, which is in turn pivoted to the bar 27 at 37. The link 33 and said arm of the bell-crank form a toggle member.

@n the rotating plate 17 are pins 38, one

, press members, the operator pulls out. the

andle 30 from the normal position shown in full Alines in these figures and by dotted lines in Figure 2, to the full line position of Figures 1 and 2. This moves thelink 33 and bell-crank member from the Figure 4 to they Figure 2 position, thus straightening the toggle and retaining the handle 30 in its operated position.

The operation of the handle has moved the bearing 24 of the shaft 22 to such an extent that the worm 28 is moved into engagement with the worm gearv 21. lThe motion of the Worm is .therefore transmitted to the gear 21 and produces a rotary movement of the plate 17. Since this plate 17 carries the pin 16, said pin together with the gear 14, the crank-head 15, and the pin 18 carried thereby, are all given a rotary nio-vement about the pin 11. The end of the'arm 7, which is attached to the pin 18, also has a rotary movement. Furthermore, as the gear 14 meshes with the fixed gear 13, said gea-r and crank-head 15 have an additional movement of rotation about the pin 16 upon the plate 17.

. One end of the arm 7 accordingly rotates about the pin 16, and with the pin 16 about the pin 11. The arm is permitted to move in the path necessitated by this double move'- ment because of the slot 19 and becausethe opposite end of the arm may travel alo-ng the slot 4 inthey table 3.

.Successive steps in the operating movements are shown in Figures 5, 6, 7, 8 and 9. The gear 13 has just twice as many teeth as the gear 14, so that a halt` revolution oi the plate 17 will result in a full revolution of the gear 14 and crank-head 15. When onequarter'of the movement of the plate 17 .has

taken place, the gear 14 and crank-head 15 have moved through a half revolution. or

from the Figure 5 to the Figure 7 position. When the plate 17 has completed a half revolution, the parts will have arrived at the Figure 9 position. At this time, one of the pins 38 has engaged the upper arm of the bell-crank-35 as indicated in Figure 2, and by its pressurethereagainst breaks the toggle formed by the other arm of the bellcrank and the link 33 and permits the spring 31 to return the bar 27 and shaft-bearing 24 to the position shown in Figure 3, thus disengagingthe,wormA from the Worm gear, and

ioperative position, the handle 30 is operated again, and the resulting movement brings the parts from the position shown in Figure 9 to that of Figure 5, thus moving the table in the opposite direction,

The table has a free movement as it overlies the parts of the operating mechanism. The roller moved in the path of an approximate ellipse during a complete rotation of the plate 17, and this permits the use of' a narrow table and housing.

The device is semi-automatic. in its operation, since it needs only to be started, and stops automatically at the end of the desired movement.

The invention is not limited in its applica.- tion to any specific form of press, but may be used to supply work to machines of different types whenever a movement of the character described is necessary or desirable.

I claim as my invention:

1. In a device of the class described, a reciprocating table, anparm connected to said table, a housing, a pin rigidly mounted therein, said arm having a slot engaging said pin and means for giving said arm a longitudinal movement and a rotary movement about said pin, thereby reciprocatin said table.

2. In a device of the class described, a reciprocating table, an arm connected tosaid ta le by a pin and groove connect-ion, a housing, a pin fixedly mounted therein, said arm having a slot'engaging said fixed pin, and means for giving said arm a combined longitudinal and rotary movement about said fixed pin, thereby reciprocating said table.

3. In a device of the class described, a reciprocating table, an arm connected to said table to move with and relatively thereto, a fixed pin, a slot in said arm en gaging said pin, and means for giving said arm a combined longitudinal and rotary movement about said pin, thereby reciprocating said table.

4. In a device of the class described, a reciprocating table, an arm connected thereto at one end, a fixed pin, a slot in said arm engaging said pin, a plate rotating on said pin, a crank-head carried by said plate and also rotating thereon, said arm connected at its other end to said crank-head, and means for rotating said plate, whereby the armis given a combined longitudinal and rotary movement about said pin and the table is reciprocated.

ciprocating table, an arm connected therewith, a fixed pin, means for guiding said arm on said pin, means for giving said arm a longitudinal and rotary movement 5. In a device of the class described, a reabout said pin, and means for automatically stopping the movement when said arm has moved through one half a revolution.

6. In a device of the class described, a reciprocating table, a housing adjacent thereto, a fixed pin mounted in said housing, a plate rotatable about said pin, and means carried by said plate and connected to said table whereby a rotary* movement ofthe plate is converted into a reciprocatory movement of said table. r

7. In a device of the class described, a table movable from one rest position to another, a housing adjacent thereto, a fixed pin in said housing, a plate rotatable about said pin, and means connecting the plate and table whereby each half rotation of the plate moves the table from one rest position to the other.

8. In a device of the class described, a reciprocating table, a housing adjacent thereto, a fixed pin in said housing, a fixed gear on said pin, a plate rotating about said pin, a crank-head rotatably mounted on said plate, a gear rotating with said crank-head and meshing with said fixed gear, an arm guided by said pin and fixed at its ends to the crank-head and table respectively,V whereby rotary movement of said plate is converted into reciprocatory movement of the table.

9. In a device of the class described, a reciprocating table, a housing, a fixed pin therein, a fixed gear on said pin, a plate and connected worm gear rotatable about said p-in, a crank-head rotatably mounted on said plate, a gear rotating therewith and meshing with the fixed gear, an arm guided by said pin and connected at its ends to the crank-head and table respectively, a source of power, and means for connecting the same to said worm gear, whereby the table is given a reciprocatory movement.

10. In a device of the class described,` a table movable from one rest position to another, a support, a fixed pin thereon, a` fixed gear on said pin, a plate rotatable on said pin, a crank-head rotatably mounted on said plate, a gear rigidly connected to said crankhead and meshing with said fixed gear, but having one half the number of teeth, and means connecting the crank-head to the table, whereby a complete rotation of the crank-head is produced by half a rotation of the plate, and the table is thereby moved from one rest position to the other.

11. In a device of the class described, a work carrying member, a rotatable plate, an axle about which said plate rotates, a fixed gear on said axle, a crank-head rotatably mounted on said plate, a gear .rigid therewith which meshes with said fixed gear,

and means connecting said crank-head with the work carrying member whereby rotary movement of the plate results in a reciprocatory movement of the work carrying member.

12. In a device of the class described, a work carrying member, a housing, a fixed axle in sa1d housing, a fixed gear on said axle, a plate and rotatable gear mounted on said axle, means normally disconnected therefrom `but movable into engagement with said rotary gear to impart motion thereto, a crank-head and associated gear mounted on said plate and meshing with said fixed gear, whereby said crank-head rotates with and on said plate, a link guided in longitudinal motion by said axle and connecting the crank-head and work carr ing member, whereby rotation of the tab e is converted into reciprocatory movement of the work carrying member.

In testimony whereof, I have hereunto subscribed m name. i

NCIS E. STEVENSON. 

